- 1[intransitive, transitive] froth (something) if a liquid froths, or if someone or something froths it, a mass of small bubbles appears on the surface a cup of frothing coffee The water gushed and frothed.
- 2 [intransitive] to produce a lot of saliva (= liquid in your mouth) The dog was frothing at the mouth. (figurative) He frothed at the mouth (= was very angry) when I asked for more money.
NAmE//frɔθ//Verb Forms present simple I / you / we / they froth
he / she / it froths
past simple frothed
-ing form frothing